Thank you for your responses.

The car seems to run much better once fully warmed up. Seems odd to me that the stalling stumbling does not occur when the vehicle is very cold, rather when it is 90% to normal operating temperature.

The car has 86,000 miles. Ignition components were all replaced about 15k ago when I replaced the head gasket/stem seals.

I am very aware of the harness issues having spent some time working at a MB dealer while in college. The harness looks good to me, insulation doesnt seem to be disintegrating but who knows. I had the nightmare thought that the harness might be the culprit. At least I have not had a check engine light as of yet!

I have not checked the overload protection relay. I just checked to see if the fuse was alright. I have heard of several people just replacing this item as a tryout.

Thanks for any advice you all may have.